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Hyperdense posterior superior sagittal sinus on the non contrast images.
The patient was immediately recalled from accident and emergency for a CT of the venous sinuses.
Large filling defect in the posterior superior sagittal sinus, corresponding with the hyperdense area on the non contrast images. The filling defect extends into the right transverse sinus.
Filling defect in the right internal jugular vein and sigmoid sinus.
No parenchymal haemorrhage or venous infarct.